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- From: stead@skadi.CSS.GOV (Richard Stead)
- Newsgroups: sci.geo.geology
- Subject: Re: rising sea level & continetal drift
- Message-ID: <51484@seismo.CSS.GOV>
- Date: 16 Nov 92 23:56:49 GMT
- References: <97619@netnews.upenn.edu> <51481@seismo.CSS.GOV> <1992Nov16.203537.25327@unocal.com>
- Sender: usenet@seismo.CSS.GOV
- Lines: 33
- Nntp-Posting-Host: skadi.css.gov
-
- In article <1992Nov16.203537.25327@unocal.com>, stgprao@st.unocal.COM (Richard Ottolini) writes:
- > In article <51481@seismo.CSS.GOV> stead@skadi.CSS.GOV (Richard Stead) writes:
- > >Finally, There has been no dramatic rise in sea level over the past few
- >
- > Some people think they see a sea level rise this century.
- > Some people have calculation the the thermal expansion of water may cause
- > sea level to rise a considerable amount and explains the amount seen this
- > century.
-
- Absolutely - I have read the reports. However, we are talking here about
- amounts so small that current technology makes it difficult to be certain
- how much this rise is. Put it this way - if your feet were at sea level
- a century ago, your ankles aren't wet yet. That's why the need for better
- measurement techniques, better instruments and satellites, etc. The amount
- measured is pretty consistant with the thermal expansion hypothesis. However,
- thermal expansion will not inundate coastal cities. It will have little
- practical effect other than a good measure of overall global warming. It
- is the melting of the ice that is most important. (And a warmer ocean will
- melt the ice that much faster).
-
-
- > New tools may help better measure sea level better. Satellite altimeritry,
- > although not too sensitive on a point to point basis, when one integrates
- > billions of locations, may give a precise measurement. Global sonar
- > tomography will measure the ocean temperature over vast areas and tell
- > how much the temperature is rising.
-
-
- --
- Richard Stead
- Center for Seismic Studies
- Arlington, VA
- stead@seismo.css.gov
-